What is the largest island in the Greater Sunda Islands?

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What is the largest island in the Greater Sunda Islands? Borneo. Borneo is the largest of the Greater Sunda Islands and the third-largest island in the world, covering about 748,000 square kilometers.

The Greater Sunda Islands are the major western islands of the Sunda group: Borneo, Sumatra, Java, and Sulawesi. Borneo stands out not only for its size but also for its political geography. The island is divided among Indonesia, Malaysia, and Brunei; Indonesia’s portion is commonly called Kalimantan.

Borneo’s interior contains extensive tropical rainforest and some of Southeast Asia’s most distinctive wildlife, including orangutans, proboscis monkeys, and Bornean pygmy elephants. Mount Kinabalu, in Malaysia’s Sabah state, is the island’s highest peak. A frequent mistake is to treat Sulawesi as one of the Greater Sunda Islands’ largest members by area; although it is included in many modern classifications, Borneo remains the largest by a wide margin.

Source: Wikipedia · fact-checked Sept. 2026

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